“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance.
Will Durant”

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AUTOR DO BLOG ENG. ARMANDO CAVERO MIRANDA SAO PAULO BRASIL

sábado, 4 de janeiro de 2014

A HIGH EFFICIENCY SINGLE STAGE FLYBACK CONVERTER FOR PLAMA DISPLAY PANEL PDP SUSTAINING POWER MODULE

A High Efficiency Single-Stage Flyback Converter
for PDP Sustaining Power Module
Kwang Min Yoo
Dept.of Electronics and Computer Engineering
Graduate School Dankook University
Advisor:Prof.Sung KyooLim
ABSTRACT
Since AC PDP was invented atthe University ofIllinois in
1964,thePDP technology hasbeen developed remarkably and
itsuccessfully entered FlatPanelDisplay(FPD)marketthanks
toitsattractivemeritssuch aswideview angle,largescreen,
high brightness,and thinness.PDP market-share becomes to
bewiden in largesizedisplay marketbutitscostisstillhigh
to compete with other FPDs,which is the most important
issue left in PDP to be solved. The operation of PDP is
divided into threeperiodsofsetup,addressing,and sustaining
and its brightness information is defined by sustain pulse
number.The sustaining power module takes charge of total
power over 80% for sustaining operation. PDP power
consumption is controlled by changing the total sustain
number according to displayed images due to the low panel
efficiency, which causes that the load current drawn by
driving circuitis varying according to subfield changes and
displayedimages.Consequently itisrequiredthatPDP sustain
power supply should have good voltage regulations under
dynamic load changes because the image qualities and
discharge margins are seriously affected by the sustain
voltage.To meet the requirements,one of the most widely
used methods is two-stage method.Ithas cascade structure
comprised of harmonic preregulator to reduce input current
harmonics and DC/DC converterto regulate a outputvoltage.
In this paper, a low cost PDP sustain power supply is
proposed based on flyback topology. By using Boundary
Conduction Mode(BCM) to control input current regulation,
DCM condition can be metunderallload conditions.
LINK https://www.mediafire.com/?pv8q5s38f1bcblb